//
//  HomePageWaterfall.m
//  YiShangPin
//
//  Created by yishangpin2 on 15/3/23.
//  Copyright (c) 2015年 yishangpin2. All rights reserved.
//

#import "HomePageWaterfall.h"

#define brim 5   //边缘
@implementation HomePageWaterfall

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/


-(void)ViewframSetX:(int)setX SetY:(int)setY Pic:(UIImage*)image delegateW:(float)width{
    
    
    _pic.image = image;
    
    _pic.userInteractionEnabled = YES;
    
    
    UIImage *smallimage = [self imageCompressForWidth:image targetWidth:width/2 - brim*2];
    
    _pic.frame = CGRectMake(brim,brim,smallimage.size.width,smallimage.size.height);
    
    self.frame = CGRectMake(setX, setY, width/2, _pic.frame.size.height + brim);
    
    
}

#pragma mark - 图片按照指定宽度 等比例缩放图片，自动调整图片高度

-(UIImage *) imageCompressForWidth:(UIImage *)sourceImage targetWidth:(CGFloat)defineWidth{
    
    
    UIImage *newImage = nil;
    
    CGSize imageSize = sourceImage.size;
    
    CGFloat width = imageSize.width;
    
    CGFloat height = imageSize.height;
    
    CGFloat targetWidth = defineWidth;
    
    CGFloat targetHeight = height / (width / targetWidth);
    
    CGSize size = CGSizeMake(targetWidth, targetHeight);
    
    CGFloat scaleFactor = 0.0;
    
    CGFloat scaledWidth = targetWidth;
    
    CGFloat scaledHeight = targetHeight;
    
    CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);
    
    
    if(CGSizeEqualToSize(imageSize, size) == NO){
        
        
        CGFloat widthFactor = targetWidth / width;
        
        CGFloat heightFactor = targetHeight / height;
        
        
        if(widthFactor > heightFactor){
            
            scaleFactor = widthFactor;
            
        }
        
        else{
            
            scaleFactor = heightFactor;
            
        }
        
        scaledWidth = width * scaleFactor;
        
        scaledHeight = height * scaleFactor;
        
        
        if(widthFactor > heightFactor){
            
            
            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
            
            
        }else if(widthFactor < heightFactor){
            
            
            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
            
        }
        
    }
    
    
    UIGraphicsBeginImageContext(size);
    
    
    CGRect thumbnailRect = CGRectZero;
    
    thumbnailRect.origin = thumbnailPoint;
    
    thumbnailRect.size.width = scaledWidth;
    
    thumbnailRect.size.height = scaledHeight;
    
    
    [sourceImage drawInRect:thumbnailRect];
    
    
    newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    
    if(newImage == nil){
        
        
        NSLog(@"scale image fail");
        
    }
    
    UIGraphicsEndImageContext();
    
    return newImage;
    
}

@end
